Goodwe GW3000-ES-20 User manual

Brand: Goodwe

Model: GW3000-ES-20

Type: User manual

User Manual

Parallel Inverter System Solution

V1.1-2023-02-20

WARNING

1. Power o the inverter before operations and maintenance. Otherwise, the inverter may be damaged or electric

shocks may occur.

2. Do not connect 3 single-phase inverters to the three phases of the grid respectively in a parallel system.

Otherwise, it will cause system error or damage to the inverters. For example, connect Inverter I to L1, Inverter II

to L2 and Inverter III to L3 to form a three-phase system.

3. Ensure that wiring sequences are the same. Do not connect L and N cables reversely on the ON-GRID port.

Neither does it on the BACK-UP port. Ensure all L and N cables are parallelized respectively on the BACK-UP port.

4. Prepare the cables according to the requirements in related user manuals of the products.

5. For one parallel system, ensure the conductor’s materials, cross-sectional areas and lengths of AC cables between

the Master Inverter and its slaves on the BACK-UP port and on the ON-GRID port, as well as the DC cables

between the battery and the inverter, are the same.

6. Install the Ezlink Module and Smart Meter on the Master Inverter. It may cause abnormal communications if the

Ezlink Module and Smart Meter are installed on the other inverters.

General Safety

Safety for the Parallel System

Notice

• The information in this user manual is subject to change due to product updates or other reasons. This guide

cannot replace the product labels or the safety precautions in the user manual unless otherwise specied. All

descriptions in the manual are for guidance only.

• Before installations, read through the corresponding user manual to learn about the product and the precautions.

Strictly follow its requirements.

• All installations should be performed by trained and knowledgeable technicians who are familiar with local

standards and safety regulations.

• Use insulating tools and wear personal protective equipment when operating the equipment to ensure personal

safety. Wear anti-static gloves, cloths, and wrist strips when touching electron devices to protect the inverter from

damage.

• Strictly follow the installation, operation, and conguration instructions in this manual. The manufacturer shall not

be liable for equipment damage or personal injury if you do not follow the instructions.

Notice

1. The parallel inverters package shall be purchased separately.

2. The equipment manufacturer provides 2 communication cables with 2 meters in length by default. Prepare the

Ethernet cable and RJ45 Modular Plug for crimping by yourself if the delivered communication cables can not meet

the demanding. Do not crimp PIN1 and PIN 2. The length of the communication cables shall not exceed 2 meters.

Otherwise it is unable for a normal communication. Do not purchase the standard Ethernet cables for parallel

systems.

Ezlink Module *1 Documents *1 Communication

Cable *2

1 Safety Precaution

2 Packing List

Parallel Inverter System Solution User Manual V1.1-2023-02-20

Master Inverter

Slave Inverter I

BACK-UP Load

PV String

Ezlink Module

Battery Breaker

Load Breaker

AC Circuit Breaker

ON-GRID Load

Smart Meter

RS485

Utility

Meter

Utility

Grid

Power cable Signal cable

Switchboard

Battery

Slave Inverter N

(3≤N≤15)

Ensure the location

and direction of the

utility meter and CT

are correct.

ATS

Notice

1. Do not connect a third party EMS device in the parallel system.

2. The UPS function is available when there are no more than 3 parallel inverters in the system; while it becomes

unavailable when the quantity exceeds this number.

3. For scenarios with parallel batteries: select the model according to the approved battery list matched with the

inverter. For requirements in the same system such as whether dierent models can be used, whether the capacity

are the same, please refer to the related battery User Manual or ask from the manuafacturer.

4. For scenarios with non-parallel batteries: select the model according to the approved battery list matched with the

inverter. It is suggested the models and capacity of the battery connected to each inverter in the system shall be

the same. Otherwise there might be system malfunctions.

5. The parallel system becomes more complex as the numbers of parallel inverters increase. When there are

more than 6 parallel inverters in the system, please contact the after-sales service to conrm the application

environment, thus ensuring a steady running.

3 Networking

3.1 Scenarios with Parallel batteries

Master Inverter

Slave Inverter I

Slave Inverter II

BACK-UP Load

Battery I

Battery II

Battery X

PV String

Ezlink Module

Manual Bypass

Switch

Battery Breaker

Load Breaker

ON-GRID Load

Smart Meter

Utility

Meter

Utility

Grid

Power cable Signal cable

Switchboard

Ensure the location

and direction of the

utility meter and CT

are correct.

Bus Bar

3-16 Pieces Parallel Inverters in the System

No More Than 3 Parallel Inverters in the System

Bus Bar

Parallel Inverter System Solution User Manual V1.1-2023-02-20

Parts Description

No. Parts Description

1Battery Select the battery model according to the approved battery list matched with the inverter. The models and

capacity of the battery connected to each inverter in the system are decided by the manufacturer.

2Bus Bar (Optional) A bus bar shall be added when multiple battery packs in parallel are connected to the inverters in

the system. For detailed information such as the battery pack quantity in parallel, bus bar and so on, please

refer to the related battery’s user manual.

3PV String PV string is composed of series connected PV panels.

4Battery

Breaker

The breakers shall conform to the requirements of local laws and regulations. 2P AC breakers shall be

prepared by the customers. The recommended specications are:

• For GW3000-ES-20, GW3600M-ES-20, GW5000M-ES-20 and GW6000M-ES-20: the nominal current ≥ 75A

and the nominal voltage ≥ 60V.

• For GW3600-ES-20, GW3500L-ES-BR20, GW3600-ES-BR20: the nominal current ≥ 100A and the nominal

voltage ≥ 60V.

• For GW5000-ES-20: the nominal current ≥ 125A and the nominal voltage ≥ 60V.

• For GW6000-ES-20, GW6000-ES-BR20: the nominal current ≥ 150A and the nominal voltage ≥ 60V.

5Inverter The G2 Version of ES Series Inverters (3.0-6.0kW) are able to be used. The inverters’ model shall be the same

in one parallel system.

6Ezlink Module • In parallel inverter scenarios, the Ezlink module is only allowed for networking.

• In one system, it is available to install only one Ezlink module and one smart meter. The inverter

connecting with the Ezlink module and the smart meter is the master inverter by default, and all

the others are slave inverters. The master inverter issues commands to the slave inverters via the

communication cables.

7AC Circuit

Breaker

When the number of inverters in the system is 3 < N ≤ 16, AC circuit breakers shall be installed on the

external of the AC side. The breakers’ specications for the BACK-UP and ON-GRID loads of one inverter

type shall be the same. AC breakers shall be prepared by the customers. The recommended specications

are:

• For GW3600M-ES-20: the nominal current ≥ 20A and the nominal voltage ≥ 230V.

• For GW3000-ES-20, GW5000M-ES-20, GW6000M-ES-20, GW3600-ES-20 and GW3600-ES-BR20: the nominal

current ≥ 40A and the nominal voltage ≥ 230V

• For GW5000-ES-20, GW6000-ES-20, GW3500L-ES-20-BR20 and GW6000-ES-BR20: the nominal current ≥

63A and the nominal voltage ≥ 230V.

8 Smart Meter When any phase’s current in the grid is no more than 120A, use the delivered smart meter or purchased

from the inverter manufacturer. Recommended model: GM1000.

When any phase’s current in the grid is more than 120A, select industrial and commercial Smart Meter and

CT. For details, please contact the After-Sales service.

9Switchboard • Prepare the switchboard by yourself.

• When there are no more than 3 parallel inverters in the system, prepare built-in AC breakers for BACK-UP

and ON-GRID loads, which are used to connect the AC cables of the inverters, and then get tied to the

grid.

• When the number of inverters in the system is 3 < N ≤ 16, prepare the switchboard with nominal current

≥ 2 x N x Imax (N refers to the parallel inverter quantity; Imax refers to the maximum output current of

the inverter.)

10 Load Breaker Depend on the actual using load.

11 Automatic

Transfer

Switch (ATS)

• When the number of inverters in the system is 3 < N ≤ 16, prepare ATS by yourself.

• ATS function:

1. when BACK-UP load is powered by the grid, to avoid un-even current under bypass mode and the load

current is too big to damage the inverter, install an ATS to ensure the grid current runs through the

ATS to provide the electricity to BACK-UP load.

2. power on all inverters in the system at the same time, to ensure electricity provided to the loads

simultaneously. Otherwise, it will cause overload protection.

• ATS specication:

1. with its normally closed contact connecting with the grid.

2. nominal current ≥ 2 x N x Imax (N refers to the parallel inverter quantity; Imax refers to the maximum

output current of the inverter.)

12 Manual

Bypass Switch

(Optional)

• When there are no more than 3 parallel inverters in the system, to ensure the BACK-UP load is powered

by the grid during the inverter maintenance, install a manual Bypass switch by yourself.

• The specication of the manual Bypass switch and the BACK-UP & ON-GRID load breakers:

• For GW3000-ES-20, GW3600M-ES-20, GW5000M-ES-20, GW6000M-ES-20, GW3600-ES-20 and GW3600-

ES-BR20: the nominal current ≥ 120A and the nominal voltage ≥ 230V.

• For GW5000-ES-20, GW6000-ES-20, GW3500L-ES-20-BR20 and GW6000-ES-BR20: the nominal current ≥

160A and the nominal voltage ≥ 230V.

Parallel Inverter System Solution User Manual V1.1-2023-02-20

3.2 Scenarios with Non-parallel Batteries

No More Than 3 Parallel Inverters in the System

3-16 Pieces Parallel Inverters in the System

Master Inverter

Slave Inverter I

Slave Inverter II

BACK-UP Load

Battery

PV String

Ezlink Module

Manual Bypass

Switch

Battery Breaker

Load Breaker

ON-GRID Load

Smart Meter

Smart

Meter Utility

Grid

Power cable Signal cable

Ensure the location and

direction of the utility

meter and CT are correct.

RS485

Switchboard

Master Inverter

Slave Inverter I

BACK-UP Load

Ezlink Module

Switchboard

Slave Inverter N

(3≤N≤15)

Battery

PV String

Battery Breaker

Battery

Breaker

AC Circuit Breaker

Load Breaker

ON-GRID Load

Smart Meter

Utility

Meter

Utility

Grid

Power cable Signal cable

Ensure the location

and direction of the

utility meter and CT

are correct.

ATS

Parallel Inverter System Solution User Manual V1.1-2023-02-20

Parts Description

No. Parts Description

1PV String PV string is composed of series connected PV panels.

2Battery Select the battery model according to the approved battery list matched with the inverter. The

models and capacity of the battery connected to each inverter in the system shall be the same.

3Battery

Breaker

The breakers shall conform to the requirements of local laws and regulations. 2P AC breakers shall

be prepared by the customers. The recommended specications are:

• For GW3000-ES-20, GW3600M-ES-20, GW5000M-ES-20 and GW6000M-ES-20: the nominal current

≥ 75A and the nominal voltage ≥ 60V.

• For GW3600-ES-20, GW3500L-ES-BR20, GW3600-ES-BR20: the nominal current ≥ 100A and the

nominal voltage ≥ 60V.

• For GW5000-ES-20: the nominal current ≥ 125A and the nominal voltage ≥ 60V.

• For GW6000-ES-20, GW6000-ES-BR20: the nominal current ≥ 150A and the nominal voltage ≥ 60V.

4Inverter The G2 Version of ES Series Inverters (3.0-6.0kW) are able to be used. The inverters’ model shall be

the same in one parallel system.

5Ezlink Module • In parallel scenarios, the Ezlink module is only allowed for networking.

• In one system, it is available to install only one Ezlink module and one smart meter. The inverter

connecting with the Ezlink module and the smart meter is the master inverter by default, and all

the others are slave inverters. The master inverter issues commands to the slave inverters via the

communication cables.

6AC Circuit

Breaker

When the number of inverters in the system is 3 < N ≤ 16, AC circuit breakers shall be installed on

the external of the AC side. The breakers’ specications for the BACK-UP and ON-GRID loads of one

inverter type shall be the same. AC breakers shall be prepared by the customers. The recommended

specications are:

• For GW3600M-ES- 20: the nominal current ≥ 20A and the nominal voltage ≥ 230V.

• For GW3000-ES-20, GW5000M-ES-20, GW6000M-ES-20, GW3600-ES-20 and GW3600-ES-BR20: the

nominal current ≥ 40A and the nominal voltage ≥ 230V

• For GW5000-ES-20, GW6000-ES-20, GW3500L-ES-20-BR20 and GW6000-ES-BR20: the nominal

current ≥ 63A and the nominal voltage ≥ 230V.

7Smart Meter When any phase’s current in the grid is no more than 120A, use the delivered smart meter or

purchased from the inverter manufacturer. Recommended model: GM1000.

When any phase’s current in the grid is more than 120A, select industrial and commercial Smart

Meter and CT. For details, please contact the After-Sales service.

8 Switchboard • Prepare the switchboard by yourself.

• When there are no more than 3 parallel inverters in the system, prepare built-in AC breakers for

BACK-UP and ON-GRID loads, which are used to connect the AC cables of the inverters, and then

get tied to the grid.

• When the number of inverters in the system is 3 < N ≤ 16, prepare the switchboard with nominal

current ≥ 2 x N x Imax (N refers to the parallel inverter quantity; Imax refers to the maximum

output current of the inverter.)

9Load Breaker Depend on the actual using load.

10 Automatic

Transfer

Switch (ATS)

• When the number of inverters in the system is 3 < N ≤ 16, prepare ATS by yourself.

• ATS function:

1. when BACK-UP load is powered by the grid, to avoid un-even current under bypass mode and

the load current is too big to damage the inverter, install an ATS to ensure the grid current runs

through the ATS to provide the electricity to BACK-UP load.

2. power on all inverters in the system at the same time, to ensure electricity provided to the loads

simultaneously. Otherwise, it will cause overload protection.

• ATS specication:

1. with its normally closed contact connecting with the grid.

2. nominal current ≥ 2 x N x Imax (N refers to the parallel inverter quantity; Imax refers to the

maximum output current of the inverter.)

11 Manual

Bypass Switch

(Optional)

• When there are no more than 3 parallel inverters in the system, to ensure the BACK-UP load is

• The specication of the manual Bypass switch and the BACK-UP & ON-GRID load breakers:

• For GW3000-ES-20, GW3600M-ES-20, GW5000M-ES-20, GW6000M-ES-20, GW3600-ES-20 and

GW3600-ES-BR20: the nominal current ≥ 120A and the nominal voltage ≥ 230V.

• For GW5000-ES-20, GW6000-ES-20, GW3500L-ES-20-BR20 and GW6000-ES-BR20: the nominal

current ≥ 160A and the nominal voltage ≥ 230V.

Parallel Inverter System Solution User Manual V1.1-2023-02-20

Conrm below items for a successful parallel networking:

1. For the installation and power on of each device in the network, please check the corresponding device’s User

Manual.

2. The installation and wiring of devices in the network such as the inverter, batteries, Ezlink module, smart meter and

so on are correct.

3. The communication of devices in the network such as the inverter, batteries, Ezlink module, smart meter and so on

are normal.

4. Before paralleling setting, the PV side or battery side of the inverter in the system is powered on and not connected

to the grid. Make sure the inverter is standby.

Step 1 Download the APP.

Step 2 Connect the inverter's Bluetooth, to check whether the rmware version of each inverter statify the requirement.

Prerequisite

Paralleling Setting

4 Parameter Setting

play

App Store <10m

SolarGo

SolarGo App

Conrm the software version of each

inverter, make sure the inverter software

version in the system is the same, and

the software version is 020204 or above.

If the inverter version does not meet the

requirements, please contact the after-

sales service center for upgrade.

Switch to "Local" 2

Select a Bluetooth signal,

which starts with SOL-BLE

and ends with the last 8

digitals of the device SN.

020204

Parallel Inverter System Solution User Manual V1.1-2023-02-20

Step 3 (Optional) When the batteries connected to one inverter are dierent, connect the inverter's Bluetooth signal,

to set single batteries' model.

Step 4 Connect Ezlink to set the master inverter's parameter; Set the parameters for parallel network based on the

hints on UI and actual applied scenarios.

Installer password:

goodwe2010

Select safety country

accordingly.

Under parallel scenario,

only General and Economic

Mode are supported.

Ensure each inverter's

working mode are the

same.

Select the battery brand

and model based on the

actual battery connected

to the inverter.

Determine whether to

perform meter detection

based on actual needs.

Select the inverter's Ezlink

signal, which starts with

CCM-BLE and ends with the

last 8 digitals of the device

SN.

Initial password:

goodwe2010

Ensure the actual

connected inverters in the

system are the same with

the number set on this

page.

Ensure that each

inverter’s working mode

are the same.

Select safety country

accordingly.

Notice

• Select the Ezlink signal to set the master inverter's parameter. These parameters will be synchronized to the slave

inverters autamatically.

• Select the Bluetooth signal to set each inverter's parameter, when the inverters' parameters can't be the same.

Step 5 Check whether the parallel quantity is correct, and whether the master inverter & its slaves are working well.

Notice

• The average SOC of the battery in the parallel system is divided by the added SOC values for the master inverter

and its slaves. The actual SOC value for each battery varies when economic mode is selected.

• The battery capacity equalization time is aected by the actual working condition of the parallel system, such as

battery capacity, battery SOC dierence, PV power generation, etc. Please refer to the actual situation for SOC

equalization time.

Parallel Inverter System Solution User Manual V1.1-2023-02-20

1. Set the safety code, working mode of the main inverter, and the brand & model of the battery in the parallel

system according to the actual needs.

2. Set the on-grid and o-grid discharge depth of the battery according to the actual needs. (For unstable grid

areas, to ensure the o-grid mode of the inverter is normal, check whether the on-grid discharge depth is ≤ 50%. If

not, it is recommended to set it to below 50%.)

3. Enable the backup power function of the inverter, and disable the AFCI detection function.

4. Power on the PV side, battery side and ON-GRID side of the inverter. Turn o the BACK-UP load switch and the

inverter is running in on-grid mode. Check whether the inverter generates alarms and the inverter working status is

on-grid via SolarGo App.

5. Power o the ON-GRID side of the inverter, the PV side and the battery side. Make the BACK-UP load switch is turned

o, and the inverter is running in o-grid mode. Check whether the inverter generates alarms and the inverter

working status is o-grid via SolarGo App.

6. Power on the ON-GRID side of the inverter when the inverter is o-grid, and the inverter enters into on-grid mode.

Check whether the inverter generates alarms and the inverter working status is on-grid via SolarGo App.

Commissioning for the Parallel System

SolarGo App

User Manual

Notice

• To ensure that the parallel system operates normally, please set the parameters according to the following

requirements after the system is connected and parallelized. For detailed operations, please refer to SolarGo App

User Manual.

• Select the Ezlink signal to set the master inverter's parameter via SolarGo App. These parameters can be sent and

synchronized to the slave inverters autamatically; When the inverters' parameters can't be the same, select the

Bluetooth signal to set each inverter's parameter.

• To avoid problems happening in the parallel system, it is suggested that all inverters and batteries in the parallel

system shall be set with the uniform parameters. If the PV panel is shaded heavily, the shadow scan function of the

inverters in the system can be dierent. It is recommended to connect the inverter’s Bluetooth signal via SolarGo

App and set the shadow scan parameters in single unit.

020204

GoodWe Technologies Co., Ltd.

No. 90 Zijin Rd., New District, Suzhou, 215011, China

www.goodwe.com

[email protected]

Parallel Inverter System Solution User Manual V1.1-2023-02-20

No. Error Cause Solution

1Communication

indicator of the

inverter and

Ezlink indicator

in error

Ezlink

connection

failed

1. Check whether the WiFi signal is normal. If it is not, check whether the

router works well.

2. Check whether Ezlink obtains IP successfully via APP. Execute the

following if IP is not obtained:

1. Reset the communication parameters via APP.

2. Check whether the server connection is correct.

3. Log in to the website mqtt.goodwe-power.com in PC, check the

analyzed IP address and obtain the connected server information.

2Unable to

parallel system

interface in APP

Parallel

networking

failed

1. Incorrect communication cable connection or unreliable cable

connection cause communication failure.

2. Connect the smart meter and Ezlink module to the same master

inverter to ensure the success rate of networking.

3. Check whether the inverter communication indicator is normal. If

it is not, please check the individual inverter according to its own

troubleshooting method.

4. If the above methods cannot solve the problem, please try to restart the

inverter and get networking again.

3Parallel IO

check fail

Communication

of parallel

inverters in

error

1. Check whether the parallel communication cable is connected correctly

and rmly.

2. If the communication cable connection is normal, it may be an internal

communication failure. Please contact the dealer or After Sale Service.

4Parallel Grid

line reversed

AC L and N

cables are

connected

reversely.

Check the grid wiring. Reconnect the ON-GRID AC cable to make sure the

grid is wired correctly.

5Battery

indicator

abnormal

Battery failure 1. Check the BMS communication cable connection, and make sure it is

reliable.

2. Check whether the battery type is matched via APP. If you can't solve

it, please refer to the user manual of the corresponding battery for

troubleshooting.

6Device oine

displayed on

APP

Communication

failure or

equipment

failure

1. Check whether the quantity of parallel machines in the system is the

same with the actual connected ones.

2. If it is, get the SN of the corresponding oine inverter from the

equipment list, and troubleshoot the corresponding inverter according

to its user manual.

3. Check whether the communication connection of the equipment is

normal, with no loose, aging or wrong connection, etc.

5 Troubleshooting

Goodwe GW3000-ES-20 User manual

Goodwe GW3000-ES-20 User manual

Goodwe GW3000-ES-20 User manual

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